Wally Wally is an automatic wallpaper changer, supporting over 30 formats of image, and using any media like hard drive, CD-ROM, network drive and any removable media. Wallpapers can change at any interval ... Cost: $8 Buy full version       Trial version       Publisher: Emx4 inc.     Descriptions Wally: Wally is an automatic wallpaper changer, supporting over 30 formats of image, and using any media like hard drive, CD-ROM, network drive and any removable media. Wallpapers can change at any interval between 1 minute and 2 hours, depending of your setup.